v24Read()
Reads from the interface.
Synopsis
int v24Read( int handle, string/blob &value, time timeout);
Parameters
| Parameter | Description |
|---|---|
| handle | The handle of v24Open. |
| &value | A string or blob, which contains the values. Strings are automatically closed with a 0 byte. |
| timeout | The maximum time the system waits for data. The script stops for this time range. |
Return value
-1 if an error occurs, otherwise 0.
Error
Missing or wrong arguments.
Description
Reads from the interface.
Example
main()
{
string v24message, sTemp;
int timeout = 2; // 2 seconds
int read;
do
{
sTemp = "";
read = v24Read(handle, sTemp, timeout);
v24message += sTemp;
}
while(strlen(sTemp) > 0);
}Assignment
Communication functions, Waiting Control functions
Availability
CTRL